Rack base plate



FIG. 1 is a perspective view of a rack base plate showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a rear elevational view of the design in a state of use; and,

FIG. 9 is an enlarged sectional view taken along line 9-9 of FIG. 8.

The broken lines shown in FIGS. 8 and 9 are for illustrating environment only and form no part of the claimed design. 

CLAIM The ornamental design for a rack base plate, as shown and described. 